We have arrived at predictable infrastructure. At Kroger, we use Nginx as a reverse proxy to route traffic with a configuration that is thousands of lines long with pull requests from dozens of teams. Even with this scale, we are still able to complete on-demand deployments to multiple environments that serve dozens of domains and route to over 50 applications clusters with zero downtime. We show an open source framework, SnowGlobe, which allows us to simulate and test every possible traffic routing situation before we deploy. We use a full CI/CD pipeline with 7,000+ tests run for every commit.